Where explosive atmospheres may form in quantities likely to present a risk to the health and safety of workers or other persons, the employer shall take the necessary measures to ensure that:
1° The working environment allows work to be carried out in complete safety;
2° Adequate supervision is provided and appropriate technical means are used;
3° Workers are provided with training in explosion protection;
4° Workers are provided, where necessary, with work clothing suitable for protection against the risks of ignition.